Alright all you 6.4 pros out there....

Here is my problem, 2010 6.4, 83,000 miles, I just finished a full delete, runs great 80-90% of the time. The issue I am having usually happens when it is cold. When I start it and let it warm up for 5+ minutes, it will "sometimes" begin to idle rough. Then when I go to take off, it will sputter a little bit and the smoke starts coming out the tail pipe is blueish/white color. Once I get up to about 30-35 mph the smoke stops, but still has a rough idle. If I pull over and turn the truck off, it seems to reset "something" turn it back on and run perfect, not smoke, no rough idle, but drives like it normally does. Then on occasion if I let it just idle after it is warm, it will begin the rough idle, and when I take off, it does the same thing again. Once I turn it off, start it up again, it runs just fine. This only happens about 10-20% of the time. Other then that it has all the power in the world, just cant seem to figure out what might be causing this.

Any ideas or suggestions what might be causing it?

 

Take a sharpie marker and mark your degas bottle cold.

Rule out a coolant loss.

Check your oil as well.

That's all I can think of.

Denny

 

whats your MPG?

fouled injectors
worn rocker tips
bent push rods
worn cam lobes
worn lifters

all could be giving you a incomplete burn

when you check things out, you should run a full tank of fuel...becuase....if you keep your fuel levels low...air entrampment occurs...and these air bubbles are compressible...so...when the computer calculates the correct mixture the computer assumes non compressible fuel....so...if air entrapment occurs...incomplete burn due to injector timing mis calculations

any one of these can give you blue smoke.

white smoke is cooling system.

 

white smoke can also be unburned fuel. Partially burned fuel shows as black smoke. Unburned fuel shows as white smoke.

 

Sort of sounds like it might be an issue with your tuner as it seems to reset when you restart it, I'd call their customer service and run it past them.